Expansive reamer



Sept. 2, 1930. J. J. SANTIAGO EXPANSiVE REAMER Original Filed Feb. 1, 1928 In the drawings the numeral10 designates "a suitable and substantially tubular body having a plurality of longitudinally extendmg slots 11 through its tubular wall adapted edges, these side wings bearing outwardly v ments mounted onrthe carriers 1S .11I1II1Ztt6I 1Ll to my-present invention. I have shown them was being rolling re'aming'cutters 13'; but they a ns b.9213" w l .w h cu ers r theultimatecutters or ultimate cutting ele-' maybe anykindof cutter gor cutting element desired forany particular' purpose. In fact i the .iiature; ofthe cutting element isnot in my invention limited even to well reaming the cutting. element mounted" on the carriers 12 may beforthe purpose of perforating or, 1 cutting oficasing or for similarjor other'op; 'e'r'ations' e I, .I have shown the body ashaving atnbular i extension '10. ithin which the man-are mov- "ing-spring 15 is h used. This spring surrounds the upper partof the ma'ndrel 16 and presses" downwardly againstja shoulder 17 andpthus tends'at all times to movethebody.

' and 1, carrier. 'relatively upwardly. ,"Immeas'heXagonal-in .cross-section. This heXag- Ional part 16* is freely rotatable within "body diate'ly'below thev springfs'eatiiig shoulder 17 5 mandrel. has L'part l6, whi'ch is noncylindric, for purposes hereinafter eX'plained,f

"andI have here chosen.to show the, part 1 6 eXtension leabumvhen themandrel and body .a'reiin the relative'positions shown in Fig. 2

' this,hexagonalpart.16%,fits into a corresponddefinite positionlf IBelow'thefheXagonal part ingfhexagonalpart'10 of the body bore so thatin this position the mandreland body are rotatively locked] together, in "a certain ofthe, mandrel has a plurality oflongitudinally extending grooves here "Shownas three in number because .the cuttercarriers are chosen to be-three in number. .The art? of the mandrel in which these grooves are cut thef mandrel part designated generally i.

fbythe' numeral 16 has a diameter greater than the lowermost reduced part 16 of the mandrel; so that, between the spaced grooves 16, the part'l6 presents three downwardly facing and circumferentially spaced shouldew-16.

The lower'reducedportion 16 of the man 1' drel has abearing in the body'bore 10%; and the mandrel throughout its length has a watercourse 16adaptedto'pass circulating water down to a drill bit'25 which is attached 'in the usualmannerfto'the'lower end of the tubularbody.-

expanded, asshown 'inFig." 4;; 'The'iiature of The mandrel grooves 16 are of proper width to take the inner or rear ends of the cutter carriers 12; and the bottoms of these grooves '16" areinclined so that as the body fcarriers are moved outwardly to their eX- ipanded posit ons.

In this expanded conditionof the "tool the hexagonal body bore 16 has also moved up ontothe hexagonal mandrel part 16 and thus the mandrel is rotatively locked directly to'the bodyand is also rotatively loeked to the carriers and through the carriers to the body.

- For insertion in a well, pipe the parts are placed in the relative positions shown in Figs.

land 6. 'Thebody and'c'utters are in their 3 relatively lower position and have been ro-' tatively adjustedso that the grooveslfi do not register with the'cutter carriers but the shoulders 16 are pressing down on the cutter carriers. Inthis position, therefore, the

the Lcutters or cutter carriers with the sur-' rounding wall cau'ses the carriers and the body to drag behind and thusallows the mandrel rela'tivelyto rotate ahead. *As soon asthemandrel has rotated relatively through about one-sixth of a revolution the 'mandrel grooves 16" registerwith the'cutter carriers and the spring 15 immediately moves the partsjtothe relative position of Fig.2, the cutters being moved to their expanded positions and the mandrel hexagon 16 enterin'g the'body heXa-gon'bore 10*. In this-condition the tool is thus locked rigidly against an relative rotation of its component parts. 'Upon pulling the tool up into the casing the casingengages the cutter carriers or cutters. and llOldStllEt body and cutters down while'the mandrel moved upwardly, the cutter carriers being moved inwardly by casin'gengageme'nt because of the diagonal upper corner surfaces 40. hen the mandrel has been moved up high enough with relation to the'body and'cutter carriers the mandrel can then be rotated to throw the shoulders 16 over the cutter carriers and the parts are then in the position of Fig. 1. To provide 7 that the shoulderscan be rotatively swung overthe carriers, although the casing may not hold the carriers down until themandrel has quite reached the relative elevated positionfshown' in Fig. 1, one corner'of each shouldersurface16 may be bevelled as shown at tlsothatrotation of the mandrel will first push the cutters further down to the position of Fig; 1, s0 that the square shoulder 16" of'vthe mandrel can then pass over thecutte'r carriers. For the same purpose the upper end of each carrier12 may begiven a'corner diagonal surface 42; ;Inth1s position the cutter carriers are again locked or"-v I 'clamped'in their contracted positionsiand I claim:-

without 'thecutters riding against its interior surface' 1. In an expansive motor the character I described, a tubular body with a slotted wall,

a cutter carriermovable in andoutthrough thewall slot, a cutter expanding mandrel in the body, the body and mandrel being movable relative to each other both longituqdinally and rotatively', a spring tending to move the body and carrierlongitudinally on the mandrel in-on'e direction, the mandrel having a carrier engaging shoulder of'limv ited circumferential extent which when en-' 1 spring.

gaged with the carrier prevents longitudinal movement of the bodyand' carrier by the 2.*In an expansive toolof the character described, a tubular body with a slotted wall,

'a fc'utter carriermovable in and out through j s d'reladapted to engage the' carrier in one the wall sl0t,a mandrel within the body, the

- body andmandrel being relatively movable;

longitudinally and rotatably on a longitudinal axis, a spring tending to vmove the body and carrier longitudmally in one d rection,

thelmandrel' andcarrier being formed; to cause outward movement of the carr er. when the body and carnage are moved in said d1 rection by the spring, and a carrier engaging shoulder of limited 'circumiterential extent on the mandrel adaptedto engage the carrier,-

in one rotative position of the mandrel to pre Y vent longitudinal movement of the carrier and body by the spring 3. In an expansive I described, a tubularbody witha slotted wall,

a cutter carrier movable" in and outthrough body and mandrel" being. relatively movable longitudinally and rotatably on a longitu-- dinal axis,ia spring'tending to movethe body and carrier'longitudinally in one direction,

' the mandrel'and carrier being formed to prevent longitudinal movement of thecarrier cause outward movement of the carrier when the body and carrier are moved in said direction by the spring, and a plurality ofcircum- I, iierentially extending and circumferentially spaced carrier engaging shoulders on the mandrel each adapted in one rotative' posi-' tion of the mandrel to engage the carrier and and bodyby the spring.

45.]In an expans ve tool of the character described, a tubular body with a slotted wall,

a cuttercarrier movable in and outthrough the wall slot, a central mandrel in the body and rotatable therein on alongitudinal axis tool "of the character andthe bodyandoarrier being movable'onthe; 7'

mandrel on, said longitudinal axis, a spring tending to move the body and fcar'rieron the I mandrel longitudinally in :one direction, the

mandrel having. a'relatively enlarged part presenting ,circumferentially spaced shoul ders lacing in the opposite "direction and said shoulders "adapted to engage with a longitudinal end of the eutterfcarrier, said enlarged mandrel part having, between said shoulders, carrier receiving slots the bottoms of which are disposed angularly with refer- I xen cej to'athe longitudinal axis so; that longi tudin'a'l inovement'of the carrier on the man drelcauses outward movement of the'ca'rri'er.

5. Inan expansive tool of the character de- Y scribed-,a tubularbody with a slotted wall, a cutter" carrier movable in and out through V v,

the wall slot, a-mandrel within thebody, the

body and carrier being relativelyfmovable longitudinally and rotatablyb on a longituof limted circumferential extent on the manrotative position of themandrelto prevent longitudinal movement of the body and carrier by the spring, and 'rotative: interlocking means 011 the mandrel and body adapted to be interengaged bysaidlongitudinal movement i;

6 In an expansive tool-of the character de- ,1 scr1bed, a tubular body with a slotted wall,

with relation to the mandreh v a cutter carrier movable in, and out through the wall slot, acentral mandrel in the body and rotatable therein 'on- 'a longitudinal axis" and the-body and carrier being movable onthe mandrel on said longitudinal axis, a spring tending to move the body and carrier on the mandrel longitudinally in onel'di'rection, the mandrel having ia' relatively enlarged part presenting circumferentially 'spacedz-s'houlders facing in the opposite direction and said I shoulders adapted to engage with a longitudinal end ofthe cutter carrier, said enlarged '1 mandrel part havmg,1between said shoulders,

)carrierreceiving slots the bottoms ofwhi'ch.

are disposed angularly with reference-tothe longitudinal axis so that longitudinal move 'ment of the carrier on the mandrel causes outward movement of the carrier, and roizo tative-interlocking means on the mandrel and body adapted to be interengaged by said longitudinal movement of the carrier relative to mandrel.

7. In an expansive tool of the character described, a tubular body with a slottedwall, a cutter carrier movablecin and out throu h I the wall slot, a mandrel rotatable in the b0 y i v and the body being movable longitudinally on 1 H the mandrel, a spring tending to move the i beciy end cutter eafrief l ol igitudinallifiin ene direction, the mandrel being fOIlnfid-tO 'caruse outwa lclhexpmsive movement 'of the carrier by said'longitudinal movement, and the ma ndrel having circumferentially alternating carrier engaging shoulders and carrier 'receiV ing grooves adapted selectively to be regis tered with t11e c;'u -rier by rotation bf vthe "have hereunto subscribed dey ofJanu ary,-l928.

mandrel. I e I V w In itness that I claim the foregoing I 1 J MES] J, SA TIAGO;

my "name this 19th CERTIFICATE OF CORRECTION.

Patent No. 1,774,764. Granted September 2, 1930, to

JAMES J. SANTIAGO.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, line 85, claim 5, for the word "carrier" read mandrel; same claim, line 93, for the misspelled word "lmted" read limited; and that the said Letters Patent should bevread with these corrections therein that the same may conform to the record of the ease in the Patent Office.

Signed and sealed this 21st day of October, A. D. 1930.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

